[FFmpeg-user] Audio and video merging

[Donald THIERY]

Hi!

I need to sync audio and video channel.

To do that i want to add silent (audio/video) at the start end the end of
the merged file.

Examples :

___AUDIO
VIDEO___

or

AUDIO___
___VIDEO

or

AAAAAAUDIO
__VIDEO____

or

AAAAAAUDIO
______VIDEO

...

I know both channel duration and start time.

Thanks you